US9771930B2 - Compressor unit, and compressor - Google Patents

Compressor unit, and compressor Download PDF

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Publication number
US9771930B2
US9771930B2 US14/386,468 US201314386468A US9771930B2 US 9771930 B2 US9771930 B2 US 9771930B2 US 201314386468 A US201314386468 A US 201314386468A US 9771930 B2 US9771930 B2 US 9771930B2
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Prior art keywords
compressor unit
compressor
operative
connecting rod
eccentric
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US20150044072A1 (en
Inventor
Arno Görlich
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Bock GmbH
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GEA Bock GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/04—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B27/053—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with an actuating element at the inner ends of the cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/04—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B27/0404—Details, component parts specially adapted for such pumps
    • F04B27/0414—Cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/04—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B27/0404—Details, component parts specially adapted for such pumps
    • F04B27/0428—Arrangements for pressing or connecting the pistons against the actuated cam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/04—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B27/0404—Details, component parts specially adapted for such pumps
    • F04B27/0442—Supporting and guiding means for the pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/045—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being eccentrics

Definitions

  • the present invention relates to a compressor unit for a compressor for compressing in particular refrigerant according to the preamble of claim 1 , as well as a corresponding compressor, in particular a radial piston compressor, according to the preamble of claim 12 .
  • a radial piston compressor which is designed for CO 2 as the refrigerant is for example known from EP 1 552 291 B1 which discloses a reciprocating engine in the form of a radial piston compressor with a compressor unit having annular, radially aligned piston cylinder units arranged next to each other, and with an eccentric shaft.
  • the eccentric shaft extends through a housing body of a machine housing which encloses the cylinders, and the eccentric thereof controls the outward stroke of the pistons.
  • the inward stroke of the pistons is controlled or respectively instigated by a common control ring engaging in the pistons.
  • the control ring is engaged in a lateral recess in each piston, running in the direction of a secant, and being adapted to a cross-sectional shape of the control ring, and bordering a floor wall of the piston, wherein the control ring is in controlling sliding contact with this floor wall by means of an inner control surface.
  • a corresponding compressor unit that is provided for compressing refrigerant has a drive device in the form of a drive shaft that is provided to drive one or more pistons arranged in a radial direction.
  • the pistons can move back-and-forth in corresponding cylinder bores in extension and retraction movements.
  • the extension movements occur in the direction directed radially outward, whereas the refraction movements signify a movement of the pistons toward the radial center.
  • the cylinder bores are also arranged in the radial direction, in particular with a cylinder bore midaxis that is arranged in the radial direction.
  • the drive device (drive shaft) is in operative engagement with an eccentric which controls the extension movement of the pistons, i.e., the pistons move in a direction that is directed radially outward in any manner by means of its corresponding eccentric movement (extension movement).
  • the eccentric can optionally be designed integral with the drive shaft and/or as a component thereof.
  • the eccentric also controls the retraction movement of the pistons according to the invention, which means that the eccentric is also responsible for a “retraction” of the pistons toward the radial center. That is, the corresponding eccentric movement of the eccentric moves the pistons in any manner in a direction directed radially inward, or respectively is causally responsible for the movement directed radially inward, as it is also responsible for the movement directed outward.
  • a compressor unit of a compressor for compressing refrigerant with a drive device, particularly a drive shaft, for driving one or more pistons that are arranged in a radial direction and that can be moved back and forth in extension and retraction movements in corresponding cylinder bores has a device for executing a extension movement of the pistons, and a device for executing the retraction movement of the pistons, which are both controlled or respectively driven by the eccentric.
  • the device for executing a extension movement of the pistons is identical with the device for executing the retraction movement of the pistons.
  • a connection between a respective piston and the eccentric would be conceivable, for example by means of, in particular, a rigid connection that e.g. can be realized in the form of a connecting rod, and that completely transmits the movement of the eccentric to the piston.
  • the eccentric of the compressor unit preferably has an operative eccentric section, by means of which it is in operative engagement with one or more connecting rods, in particular operative connecting rod sections of the respective connecting rods.
  • the operative eccentric section preferably has a circular cross-section, and the operative connecting rod cross-sections are preferably shaped as a circular segment corresponding thereto on their side facing the operative eccentric section.
  • a bearing in particular a needle bearing, is arranged between the operative connecting rod section and the operative eccentric section which ensures a very low-friction and hence low-energy-loss drive of the connecting rods and the pistons operatively engaged thereto.
  • the operative connecting rod sections are arranged on a circular path around the operative eccentric section.
  • This embodiment is in particular also suitable for the aforementioned arrangement of a bearing, in particular a needle bearing, between the two operative sections.
  • the device identified as the compressor unit in the present application can constitute a compressor.
  • a compressor that delivers drive from an external drive source for the drive device, such as a drive shaft of the compressor unit.
  • a compressor that, in the simplest embodiment, can be identical to the compressor unit but which can have additional components, and a compressor unit that exclusively serves to compress a fluid, in particular a refrigerant, especially a gaseous refrigerant.
  • FIG. 1 A sectional view of an embodiment of a compressor according to the invention in a section perpendicular to the axial direction;
  • FIG. 2 Another sectional representation of a compressor according to the invention in a section parallel to the axial direction;
  • FIG. 1 shows a sectional view of a compressor 10 according to the invention, wherein the section is in the region of a compressor unit 12 of the compressor 10 according to the invention perpendicular to an axial direction.
  • a compressor unit 12 has six pistons 14 that can be moved back and forth in a radial direction and are arranged in corresponding cylinder bores or cylinder linings 16 .
  • the cylinder bores or respectively cylinder linings 16 themselves are designed as corresponding recesses in a cylinder block 18 .
  • the pistons 14 are designed such that they can move back and forth in the radial direction.
  • the compressor unit 12 serves to compress refrigerant wherein, in the embodiments described herein and shown in the figures, R744 (CO 2 ) preferably is the refrigerant. It should however be noted that use of any other refrigerant (such as R134a, etc.) is conceivable. Stated otherwise, the subject matter of the present invention is a refrigerant compressor for compressing refrigerant, in particular CO 2 . It is a compressor that in particular is provided for compressing gaseous media, i.e., a compressor for compressing gaseous refrigerant.
  • the compressor unit 12 has a drive device in the form of a drive shaft 24 (see for example FIG. 2 ), by means of which the compressor unit 12 can be driven.
  • the drive shaft is coupled to an electric motor (not shown), but can however also be coupled to a corresponding belt drive device or other device in an alternative embodiment.
  • the axial extension of the drive shaft 24 depending on the intended use, can also be shorter than the embodiment shown in the figures in which the drive shaft 24 is in operative engagement with the electric motor and extends through the electric motor.
  • the refrigerant is drawn into the cylinder bores or respectively cylinder liners 16 during a refraction movement of the pistons, is compressed upon execution of the extension movement, and is then ejected.
  • the drive device in the form of the drive shaft 24 is in operative engagement with an eccentric 28 . More precisely, the drive shaft 24 is designed eccentrically in a corresponding region (eccentric section of the drive shaft 24 ).
  • the eccentric 28 is hence designed to be integral and a single piece with, and on, the drive shaft 24 .
  • the eccentric 28 can also be designed as a separate component and attached to the drive shaft 24 , in particular articulated or correspondingly mounted.
  • the eccentric 28 In a section perpendicular to the axial direction, the eccentric 28 has a circular cross-section and eccentric surfaces 30 directed radially outward that are arranged in a region of an operative eccentric section 32 .
  • the operative eccentric section 32 serves to drive the pistons 14 and is in operative engagement with them by means of a connecting rod 34 assigned to each piston 14 .
  • the connecting rods 34 are articulated to the pistons 14 by means of connecting rod eyes 36 that are formed on the sides of the connecting rods 34 facing the pistons 14 .
  • the connecting rods 34 On the side facing the eccentric 28 , the connecting rods 34 have an operative connecting rod section 38 that serves to operatively engage the eccentric 28 .
  • the eccentric 28 is in operative engagement with the operative connecting rod sections 38 by means of a bearing in the form of a needle bearing 40 that is arranged on the eccentric operating section 32 (circular cross-section) where it is arranged on the eccentric surface 30 (fitted).
  • a bearing in the form of a needle bearing 40 that is arranged on the eccentric operating section 32 (circular cross-section) where it is arranged on the eccentric surface 30 (fitted).
  • other bearings are conceivable, in particular slide bearings or roller bearings in any possible design.
  • the bearing 40 ensures a low friction transfer and conversion of the movement (rotary movement) of the eccentric 28 in a movement directed in a radial direction of an effective connecting rod section seat 42 that is in operative engagement with the bearing by means of a corresponding fit.
  • the corresponding movement in a radial direction is then correspondingly transferred to the connecting rods 34 and the pistons 14 articulated thereto.
  • the operative connecting rod sections 38 that are designed to correspond with the circular outer perimeter of the bearing 40 and are shaped as a circular segment on their side facing the bearing 40 have an extension that widens in an axial direction at their end facing the bearing such that they are securely arranged on the bearing 40 in two shells 44 designed with an L-shaped cross-section and that form the operative connecting rod section seat 42 .
  • the operative connecting rod sections of all connecting rods 34 are arranged on a circular path around the eccentric 28 and hence also around the operative eccentric section 32 that is concentric therewith.
  • the pendulum point of the device is arranged eccentrically due to the use of the eccentric, the present construction in which circular-segment-like operative connecting rod sections are used and the movements of the connecting rods can be disengaged from each other, a different movement can occur in each case in the region of the respective pistons. If the connecting rods were rigidly coupled, a fault would arise in the stroke movement and hence increase the dead space in the region of the pistons distant from the pendulum point.
  • the compressor unit 12 and hence the compressor 10 are a compressor unit 12 or respectively compressor 10 which is designed as a refrigerant compressor that has CO 2 as a refrigerant, or for which CO 2 is used as the refrigerant.
  • the ratio of the stroke of a cylinder to the diameter of its bore is 0.3 to 1, in particular 0.3 to 0.7, and more particularly 0.35 to 0.5 and more particularly 0.4.
  • the value of the stroke/bore ratio is 0.3 to 1, in particular 0.3 to 0.7, more particularly 0.35 to 0.5 and more particularly 0.4.
  • the compressor unit according to the invention has 3 to 8 pistons in possible embodiments, in particular 4 to 6 pistons. Particularly for CO 2 compressors, more particularly for CO 2 compressors of a small design, this is a favourable number of pistons for the design.
  • the above-described embodiment of the compressor 10 has the electric motor 26 for driving the compressor unit 12 , wherein the electric motor 26 is in operative engagement with the drive shaft 24 of the compressor unit 12 , or respectively drives it.
  • the compressor 10 of the described embodiment is a hermetically designed compressor, wherein it is noted that the concept according to the invention is of course applicable to open, semi-hermetic, hermetic and other compressors with a different design.
  • the compressor does not have to be driven by an electric motor and can also be designed as a belt drive or another drive option that may be integrated in the compressor, or is also located outside of the compressor.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Compressor (AREA)
US14/386,468 2012-03-19 2013-03-19 Compressor unit, and compressor Active 2033-12-08 US9771930B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102012005297.9 2012-03-19
DE102012005297 2012-03-19
DE102012005297A DE102012005297A1 (de) 2012-03-19 2012-03-19 Verdichtereinheit, sowie Verdichter
PCT/EP2013/000830 WO2013139468A1 (de) 2012-03-19 2013-03-19 Verdichtereinheit, sowie verdichter

Publications (2)

Publication Number Publication Date
US20150044072A1 US20150044072A1 (en) 2015-02-12
US9771930B2 true US9771930B2 (en) 2017-09-26

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ID=47913370

Family Applications (1)

Application Number Title Priority Date Filing Date
US14/386,468 Active 2033-12-08 US9771930B2 (en) 2012-03-19 2013-03-19 Compressor unit, and compressor

Country Status (5)

Country Link
US (1) US9771930B2 (de)
EP (1) EP2828524B1 (de)
CN (1) CN104334876B (de)
DE (1) DE102012005297A1 (de)
WO (1) WO2013139468A1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107542660A (zh) * 2016-06-24 2018-01-05 王辉明 转子滑轨式空气压缩机
CN109519375A (zh) * 2017-09-16 2019-03-26 张呈林 差动式菱形活塞压缩机
CN109519370A (zh) * 2017-09-16 2019-03-26 张呈林 槽轮式菱形活塞液压泵
CN109322810A (zh) * 2018-11-28 2019-02-12 浙江盛源空压机制造有限公司 一种星型空压机
DE102020211680A1 (de) 2020-09-17 2022-03-17 Thyssenkrupp Ag Kolben-Zylinder-Baugruppe für einen Radialkolbenverdichter sowie Radialkolbenverdichter

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB177225A (en) 1920-12-17 1922-03-17 William Reavell Improvements in or relating to air compressors
FR538037A (fr) 1921-07-07 1922-06-02 Ci Ind Et Commerciale Du Cycle Et De Lautomobile Appareil compresseur d'air, destiné plus particulièrement à actionner des appareils avertisseurs à air comprimé
GB1122348A (en) 1966-05-26 1968-08-07 Culk Raimund Improvements in or relating to refrigeration compressors
US4339988A (en) * 1980-04-08 1982-07-20 Ford Motor Company Free eccentric reciprocating piston device
US5280745A (en) * 1991-05-22 1994-01-25 Honda Giken Kogyo Kabushiki Kaisha Radial-pluger-type apparatus with variable plunger stroke
US5415078A (en) * 1994-04-05 1995-05-16 Beveridge; John H. Reciprocating piston machine
US20050120984A1 (en) * 2003-12-03 2005-06-09 Peter Kuhn Reciprocating engine
WO2007036972A1 (en) 2005-09-27 2007-04-05 Smit - Srl Societa'motopropulsori Idraulici Hydraulic machine with radial cylinders having an improved crank bearing
DE102005047284A1 (de) 2005-10-01 2007-04-12 Danfoss A/S Kältemittelverdichter
US20090178433A1 (en) * 2004-09-30 2009-07-16 Eiji Kumakura Positive displacement expander
DE102008025323A1 (de) 2008-05-27 2009-12-03 Danfoss A/S Kältemittelverdichter
WO2012107480A1 (en) * 2011-02-10 2012-08-16 Boostheat Gaseous fluid compression device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5765451A (en) * 1995-02-09 1998-06-16 Carone; Robert P. Slipper bearing assembly for radial internal combustion engine
CN2627240Y (zh) * 2003-06-19 2004-07-21 奚文祥 活塞式偏心轮压缩机

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB177225A (en) 1920-12-17 1922-03-17 William Reavell Improvements in or relating to air compressors
FR538037A (fr) 1921-07-07 1922-06-02 Ci Ind Et Commerciale Du Cycle Et De Lautomobile Appareil compresseur d'air, destiné plus particulièrement à actionner des appareils avertisseurs à air comprimé
GB1122348A (en) 1966-05-26 1968-08-07 Culk Raimund Improvements in or relating to refrigeration compressors
DD64769A5 (de) 1966-05-26 1968-11-20 Raimund Culk Kältekompressor
US4339988A (en) * 1980-04-08 1982-07-20 Ford Motor Company Free eccentric reciprocating piston device
US5280745A (en) * 1991-05-22 1994-01-25 Honda Giken Kogyo Kabushiki Kaisha Radial-pluger-type apparatus with variable plunger stroke
US5415078A (en) * 1994-04-05 1995-05-16 Beveridge; John H. Reciprocating piston machine
US20050120984A1 (en) * 2003-12-03 2005-06-09 Peter Kuhn Reciprocating engine
EP1553291B1 (de) 2003-12-03 2009-03-11 ixetic Bad Homburg GmbH Hubkolbenmaschine
US20090178433A1 (en) * 2004-09-30 2009-07-16 Eiji Kumakura Positive displacement expander
WO2007036972A1 (en) 2005-09-27 2007-04-05 Smit - Srl Societa'motopropulsori Idraulici Hydraulic machine with radial cylinders having an improved crank bearing
DE102005047284A1 (de) 2005-10-01 2007-04-12 Danfoss A/S Kältemittelverdichter
DE102008025323A1 (de) 2008-05-27 2009-12-03 Danfoss A/S Kältemittelverdichter
US20100092313A1 (en) 2008-05-27 2010-04-15 Danfoss A/S Refrigerant compressor
WO2012107480A1 (en) * 2011-02-10 2012-08-16 Boostheat Gaseous fluid compression device

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
German Search Report dated Mar. 4, 2013 issued in corresponding German patent application No. 10 2012 005 297.9.
International Search Report dated May 27, 2013 issued in corresponding International patent application No. PCT/EP2013/000830.
Written Opinion dated May 27, 2013 issued in corresponding International patent application No. PCT/EP2013/000830.

Also Published As

Publication number Publication date
US20150044072A1 (en) 2015-02-12
WO2013139468A1 (de) 2013-09-26
DE102012005297A1 (de) 2013-09-19
EP2828524A1 (de) 2015-01-28
CN104334876B (zh) 2017-05-17
CN104334876A (zh) 2015-02-04
EP2828524B1 (de) 2022-05-11

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